Responsive Images

Checks for responsive images with srcset attribute

Rule ID	images/srcset
Category	Images
Scope	Per-page
Severity	info
Weight	3/10

Solution

Use srcset and sizes attributes to serve appropriately sized images for each viewport. This reduces bandwidth on mobile and improves LCP. Example: srcset=‘img-320.jpg 320w, img-640.jpg 640w, img-1280.jpg 1280w’ sizes=‘(max-width: 640px) 100vw, 50vw’. Use <picture> element for art direction.

Enable / Disable

Disable this rule

[rules]
disable = ["images/srcset"]

Disable all Images rules

[rules]
disable = ["images/*"]

Enable only this rule

[rules]
enable = ["images/srcset"]
disable = ["*"]